Bug #61521 [NEW]: fopen uses stale data on symlinks - opens old file instead

From: Date: Mon, 26 Mar 2012 20:29:55 +0000
Subject: Bug #61521 [NEW]: fopen uses stale data on symlinks - opens old file instead
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-168852@lists.php.net to get a copy of this message 
From:             
Operating system: Ubuntu
PHP version:      5.3.10
Package:          Filesystem function related
Bug Type:         Bug
Bug description:fopen uses stale data on symlinks - opens old file instead

Description:
------------
After opening a symlink, PHP will always use the original link location,
even if the link is externally modified during script execution.

Test script:
---------------
<?php
file_put_contents("linkOrig", "old data");
file_put_contents("linkNew", "new data");

//create the link
symlink("linkOrig", "link");
//ln -s linkOrig link;//this also works

file_get_contents("link");//open it and read it (caches the link data)

//simulate another program altering it
ln -fs linkNew link;

echo file_get_contents("link");


Expected result:
----------------
new data

Actual result:
--------------
old data

-- 
Edit bug report at https://bugs.php.net/bug.php?id=61521&edit=1
-- 
Try a snapshot (PHP 5.4):            https://bugs.php.net/fix.php?id=61521&r=trysnapshot54
Try a snapshot (PHP 5.3):            https://bugs.php.net/fix.php?id=61521&r=trysnapshot53
Try a snapshot (trunk):              https://bugs.php.net/fix.php?id=61521&r=trysnapshottrunk
Fixed in SVN:                        https://bugs.php.net/fix.php?id=61521&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61521&r=needdocs
Fixed in release:                    https://bugs.php.net/fix.php?id=61521&r=alreadyfixed
Need backtrace:                      https://bugs.php.net/fix.php?id=61521&r=needtrace
Need Reproduce Script:               https://bugs.php.net/fix.php?id=61521&r=needscript
Try newer version:                   https://bugs.php.net/fix.php?id=61521&r=oldversion
Not developer issue:                 https://bugs.php.net/fix.php?id=61521&r=support
Expected behavior:                   https://bugs.php.net/fix.php?id=61521&r=notwrong
Not enough info:                     https://bugs.php.net/fix.php?id=61521&r=notenoughinfo
Submitted twice:                     https://bugs.php.net/fix.php?id=61521&r=submittedtwice
register_globals:                    https://bugs.php.net/fix.php?id=61521&r=globals
PHP 4 support discontinued:          https://bugs.php.net/fix.php?id=61521&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=61521&r=dst
IIS Stability:                       https://bugs.php.net/fix.php?id=61521&r=isapi
Install GNU Sed:                     https://bugs.php.net/fix.php?id=61521&r=gnused
Floating point limitations:          https://bugs.php.net/fix.php?id=61521&r=float
No Zend Extensions:                  https://bugs.php.net/fix.php?id=61521&r=nozend
MySQL Configuration Error:           https://bugs.php.net/fix.php?id=61521&r=mysqlcfg

Thread (2 messages)

« previous php.bugs (#168852) next »